MAX14941 Datasheet, PDF (16/21 Pages) Maxim Integrated Products – 5kV Isolated 20Mbps Half-Duplex PROFIBUS

MAX14941/MAX14942
5kV Isolated 20Mbps Half-Duplex PROFIBUS/
RS-485 Transceivers with ±35kV ESD Protection
RXD
RE
TXD
DE
INTEGRATED
ISOLATION
BARRIER
A
120Ω
B
B
A
RS-485 TRANSCEIVER
DE TXD _RE RXD
Figure 10. Typical Isolated Half-Duplex RS-485 Application
A
120Ω
B
B
A
RS-485 TRANSCEIVER
RXD
RE
TXD
DE
MAX14941
MAX14942
DE TXD _RE RXD
VDDA
0.1µF 1µF
1
1
RXD
RE
TXD
DE
VLDO
0.1µF 1µF
MAX14941
MAX14942
22
LDO
VDDB
1µF
0.1µF
VDDB
0.1µF 1µF
22
A
390Ω
390Ω
PROFIBUS A LINE
33
A
VLDO
1µF 0.1µF
3
3
LDO
MAX14941
MAX14942
220Ω
220Ω
B
PROFIBUS B LINE
B
390Ω
390Ω
2
1
2
3
3
4
Figure 11. Typical Isolated Profibus Application
VDDA
1µF 0.1µF
44
RXD
RE
TXD
DE
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